diff options
| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2014-01-10 12:41:22 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2014-01-10 12:41:22 +1100 |
| commit | 0f6fd54578bbb1afd086a3af040f1f59cb6d0ad9 (patch) | |
| tree | 03451b8a792558c43e6742dc21ec212241310e5a /mm | |
| parent | 3d7d97436a30651c3fbc46188992b6b0c8627481 (diff) | |
mm/migrate: add comment about permanent failure path
Let's add a comment about where the failed page goes to, which makes code
more readable.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Christoph Lameter <cl@linux.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: Rafael Aquini <aquini@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/migrate.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index f9e16350d09c..626ca3c5d07b 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1125,7 +1125,12 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page, nr_succeeded++; break; default: - /* Permanent failure */ + /* + * Permanent failure (-EBUSY, -ENOSYS, etc.): + * unlike -EAGAIN case, the failed page is + * removed from migration page list and not + * retried in the next outer loop. + */ nr_failed++; break; } |